Not the worst of the mayors which the city has endured and at one point in time he was moderately decent at mayoring and prior to that as a congressman.
His politics changed over the years as have those of many politicians and people in general. Often they changed in a direction which was less than satisfactory (at least to my way of thinking).
One of my biggest beefs with Ed Koch was how he began the decline of affordable housing in New York City (all 5 boroughs). Koch was not an advocate or supporter of rent guidelines (stabilization and rent control policies..insanely annoying since he himself lived in a village apartment which was rent controlled), nor did he give a damn about the single people living in the s.r.o.s (single room occupancy). When he was first elected in 1977 there were several buildings which fell under the s.r.o. categorization. Places on the west side in the 6os and 70s where people had their own room, shared bath, most times with no cooking facilities were in some cases demolished, in others the buildings were renovated and turned into full size and unaffordable apartments. Men and women who worked minimum wage or low wage and people on fixed incomes were quickly evicted and left to their own devices for locating other accommodations. The homeless population exploded. (it grew more later in the Koch years but for different reasons).
In the overall scheme of things, Koch was something of a pied piper and by prancing about the city could get people to believe he was doing good for the city when many times maybe he wasn't. He did however lead the city back up from a financial edge...although the low wage people were those who ended up paying the most.
By the end of his 3rd term people had grown weary of him and threw David Dinkins on the subway tracks which proved disastrous and led to the horrors of Dictators Giuliani and Bloomberg, 2 f.h.s that must have things done their way or else it won't get done. Koch at least occasionally worked with people.
May he find peace in whatever hereafter he's been sent to.
http://www.nytimes.com/2013/02/02/nyregion/edward-i-koch-ex-mayor-of-new-york-dies.html?pagewanted=all&_r=0